Building-block mold



Feb. 27, 1923.

- T. U. CARGILL.

BUILDING BLOCK MOLD.

2 SHEETS-SHEET l.

FILEDV JUNE 2,1921.

LHrPoRNEY Feb. 27, 1928. 1,446,832. T. U. CARGILL.

BUILDING BLOCK MOLD.

FILED JUNE 2.1921. y 2v SHEETS-SHEET 2.

E60 D SLNELITOR 5D" T. LLC/:LRGLLLLl Patented Feb. 27, i923.

Unirse finesse-7 reinar orFiCE- THEoDoRn U. oAnGILL, orwAsHINeTon, nIsfinIofr` or COLUMBIA. i

BUILDING-BLOCK MOLD.

Application inea June 2, 192i. serial ivo/474,411;

which it appertains to" make and usey the..

same.

' The present invention relates to building block molds, and yaims to provide a novel and improved mold for the production of build# ing blocks lfrom concrete or other plast-ic material, and includingsections which can be readily assembled and taken apart in moldinoI the blocks.

Another Objectis the provision of a novel mold for forming plastic buildingb'locks with endrreces'ses to provide spaces between and within the adjacent end portions of the blocks when laid end to end, for the flow of air therethroughand to render the wall composed of the blocks a better insulator of heat and cold. Y

A further objectV is the provision of a block mold comprising sections having novel means for assembling` and'fastening them together and enabling the sect-ions to be readily separated after the concrete hasv set, without danger of breaking the block.

With the foregoing and other objects'in view, which will be understood as the description proceeds, the invention resides in the construction and arrangement of parts, as hereinafter described vand claimed, itl being understoodthat changes lcan bemade within the scope of what is claimed, vwithout departing from the spirit of the invention.

The invention is illustrated in the accompanying drawings, wherein:

Figure 1 is a plan view of the main mold for making a. block ofv N or Z shape for building purposes. Y

Fig.V 2 is an end View thereof.

Fig. V3 is a side elevation, showing a portion in section. Y

Fig. 4 is across section on the line 4-4 of Fig. 1.

Fig. 5 is a plan view of a` modified form l of moldfor producing a corner block.

The portion 12 extends between the Fig. 7 is a of mold. Y The mold shown in Figs 1, 2,8,y and4 is plan view of still another form for the production ofthe main buildinoblock, which is of N or "Z shape, and suc mold comprises a pair of'Y duplicate sections composed of sheetmetalf"Each mold sec` tion comprises' a sheet metal 'strip disposed on edge, and bent to provide the side wall 11, spaced end wall portions 12aiid 13`and the inner walls 14 and 15 coiivergingffrom the port-ions 12 and 13. The wall 15 is paral- 'lel with but shorter than thevside wall 11, -I f V and the wall 14feXtends obliquely between the portion 12 and inner end of the wall 15. o adia-Y cent ends of the walls 11 and 14.

l/Vlien the two sections are disposed in rey j versed p ositions'with the ends of the strips together, andthewalls 11 and `15 confronting one another vaswell asthe walls 14, the space' between such walls surrounded bythe sections is of N or Z shape, as seen-in'Fig. 1. rlhe walls 14 and 15 of eachvsection provides a reentrant angle to form a recessv of corresponding shapein the end of the block. The lower edges of thefwalls`14'and 15 have flanges 16 bent toward one afnotherftofstifff en'said v,walls and prevent them from bending under pressure against same from within the molc.. Y

ln Order toclose the space of eachmold section betweenjthe walls 14 and v15, a top plate 17'01"' triangular form is Yfi'ttedbetween Vthe upper edges ,of said walls ,and is secured;

thereto, suoli as by means of a downturned flange 18 extending along theedges of theplate 17 and riveted or otherwise secured to the walls 14 and 15. vThe top platesl of the mold sections are preferably vflush with vvthe vupper edges of the walls and will prevent the Vconcrete or plastic material fromv spilling i between the walls 14 andy 15 when being poured ordumped into .the mold. .Said plates 17 will also strengthen the sections,

and form webs between the walls 14 and 15 f rigidly uniting or connecting them.

The ends rof the strips from which the mold sections are bent, are provided?. with portionsy to engage'one another, to prevent the side walls 11 from springing/outwardly under the pressure from within the mold.

Thus, as shown, the ends of thef walls 11 opposite to the corresponding end .wall porlOO iio

tions 12'fhave tongues or projections 19 exs tending therefrom, to pass through v slots 20 in the end wall portions 13 of the opposite sections, when the sections are slid together longitudinally. The portions 13 have the extensions 21 adjacent to the slots 20, and the outer edges of the portions 13 are otherwise flush with the outer surfaces of the walls 11. rIhe tongues 19 in passing into the slots 20, will prevent the side walls 11 from springing away from the inner walls 15. Y

lVeans are provided at the diagonally opposite corners, where the terminal portions of the sections are interengaged, for fastening'the sections together against accidental separation. Thus, keepers 22 are riveted or otherwise secured to the side walls 11 and project-from those ends thereof opposite to the corresponding portions 12 to extend across the outer edges of the portions 13 of the opposite sections, and said keepers 22 have notches 23 for receiving latches 24 pivoted, as at 25, to the portions 13. After the sections are assembled to move the tongues 19 into the slots 2O and the keepers 22 across the edges of the portions 13,-the latches 24 are swung down into the notches 23, and by cam action in said notches, will tightly clamp the portions 13 in abutment against the endsof the walls 11. rilhis will secure the sections tightly together.

In order to face the opposite sides of the block, or to form the surfaces of the sides of the block with any suitable or desired impressions, for purpose 'of ornamentation or appearance, die plates 26 are securedv to the inner surfaces of the side walls 11 by means of screws 27, or the like, and their inner exposed surfaces can be ribbed or otherwise formed to make impressions in the opposite sides of the block accordingly. These plates 26 can be readily removed to be replaced by others, and plates having different styles of die impressions can be used interchangeably. When the material is poured into the molds and rammed or packed therein, it is pressed tightly against the plates 26, to form the side surfaces of the block accordingly.V i

In using the mold, when the sections are assembled and secured, they can he seated on a table or other surface and the plastic mixture poured into the molds and rammed or packed tightly therein, such material being levelled off flush with the upper edges of the sections. After the material has set, the latches 24 are disengaged from the keepers 22, and two sections, after being moved longitudinally apart a short distance, to withdraw the tongues 19 from the slots 20, can then be separated easily. The block will remain seated on the table or surface, and will be of N form, having the recesses in the opposite ends thereof, whereby when the blocks are laid end to end, the recesses register and form spaces through, which the air can flow upwardly in the wall. The opposite side portions of the block are connected by a diagonal web or portion.

F ig. 5 shows a mold for making the corner blocks. rlhe corner block has one end closed where it is exposed at the corner of the building wall or at the end or edge of such wall. The mold comprises two sections, and one section is similar in shape to the sections of the mold above described, and includes the side wall 11 -which is slightly longer than the side walls 11, spaced end wall portions 12 and 13 and converging inner walls 14 and 15. The other section is of angular or L shape, and includes a side wall 11 and the end wall 13. The end wall of the second section does not have the reentrant portion, but is vstraight across the end of the mold, to form the block accordingly. A triangular core shell 28 is disposed within the mold with its three sides parallel with and spaced fromthe walls 11, 14 and 13, to form an opening in the block. This shell 28 has an upper plate or web 29 similar to the plate or web 17 secured to and located between the upper edges of the walls 14 and 15. Said plates or webs strengthen the structure and also prevent the material from dropping down between the inner walls outside of the mold space. The block is of substantially the same form as the N shaped block, with the exception that the block has one end closed. Die plates 26 are also secured to the walls k11', 11 and 13 to form the surfaces of the side and end walls of the block accordingly, and the terminals of the two sections are secured together in the same manner as hereinbefore described.

Fig. 6 shows a mold for making a U or halfL block to be used at the ends or edges of a wall, with the ends of the blocks flush.

This mold also comprises ytwo sections. One

section includes the side wall 30 and end ywall 31, and the other section includes the opposite side wall 32, end wall portions 33 and 34, and inner walls 35, 36 and 37 spaced from and parallel with the respective walls 32, 31 and 30. Die plates 26 are secured to the walls 30, 31 and 32 at the inside to formthe surfaces of the side and end walls of the block, and the sections of the mold are secured together in the same manner as hereinbefore described.

Fig. 7 shows still another form of mold for making a corner block, and each section "of the mold has aside wall and an end wall.

entrant portion 141 with a top plate or web 171. The opposite ends of the sections are connected as herembefore described, and

the Walls 110 and 121 have the plates 260 at the inside for linishing one side and one end of the block. The opposite side and end of the block are formed with recesses Where they match the companion blocks.

Having thus described the invention, what is claimed as new is l. A building block mold comprising sections of angular form including Walls arranged at angles with one another, one wall having a reentrant portion with spaced walls, and means for slidably connecting said sections and securing` them together and so arranged that the section having the reentrant portion can be slid longitudinally of such portion for the Withdrawal of said portion from the molded block.

2. A building block mold comprising sections having side andend Walls7 the end Walls having reentrant portions, said side and end Walls of the sections having portions to interengage one another when kthe sections are moved together longitudinally,

and. means for fastening the sections to-v gether. Y Y

In testimony whereof Iihave signed my name to this specification.

f THEODORE U. CARGILL. 

